Tactics, the Matrix, and Habits
Yes, tactics are important. But how many, and what are they good for anyway?
If you play chess primarily for fun, you will pick up tactics in a way best suited to you: through playing.
For those who wish to progress in Chess, there are online sites. Thankfully the days of combing through weekly newspapers for a single puzzle are gone, and you can do as many tactics as you can mentally manage online. I personally use ideachess.com and chesstempo is very good as well. en.lichess.org has mating tactics only, so it's good to get a bit of each, in my opinion.
What is awesome about binging on tactics, is after a while, you enter the matrix and tactics jump out everywhere! It's quite incredible. A simple formula would be More tactics = Matrix power of tactical sight. I kid you not.
It takes roughly 30 days to form a habit, so challenge yourself to do 50-100 tactics per day for a month (I'll do the same), and let's see if you don't just feel superhuman about your tactical ability.